Nfa A409 (sa 4624) over Roan Creek
PoorClosed to trafficJohnson County, Tennessee · Lt Dry Run Rd-S Off SR167 · Structure no. 460A4090001
- Built
- 1975
- 50 years old
- Condition
- Poor
- inspected April 2024
- Type
- Stringer/Multi-beam or Girder
- Steel
- Length
- 78 ft
- 2 main spans
- Daily traffic
- 160
- 2020 count
- Owner
- County
- County Highway Agency
About this bridge
Nfa A409 (sa 4624) over Roan Creek is a steel stringer/multi-beam or girder carrying Nfa A409 (sa 4624) over Roan Creek in Johnson County, Tennessee. It was built in 1975, so it is 50 years old, older than the Tennessee average of 47.4 years.
The most recent inspection reported to the Federal Highway Administration rates it in poor condition with a lowest component rating of 0 out of 9. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. Its operating status is: closed to all traffic.
It carries about 160 vehicles a day, roughly 2% of them trucks, projected to reach 256 by 2042. The structure is 78 ft (23.9 m) long and 20 ft wide. If it were closed, the detour would be 11.8 mi (19 km).
Location
Open in Google MapsCondition and inspection
The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions.
| Component | Rating | Meaning |
|---|---|---|
| Deck | 0 Failed | Out of service and beyond corrective action. |
| Superstructure | 0 Failed | Out of service and beyond corrective action. |
| Substructure | 0 Failed | Out of service and beyond corrective action. |
| Channel and channel protection | 0 Failed | Out of service and beyond corrective action. |
Structure
Traffic and service
Ownership and planned work
Frequently asked questions
When was Nfa A409 (sa 4624) over Roan Creek built?
It was built in 1975, making it 50 years old in 2025.
What condition is Nfa A409 (sa 4624) over Roan Creek in?
The National Bridge Inventory rates it in poor condition. The lowest-rated primary component is rated 4 or below, indicating advanced deterioration. Poor does not mean unsafe; such bridges are inspected more often and may carry load restrictions. The last reported inspection was in April 2024.
How much traffic does Nfa A409 (sa 4624) over Roan Creek carry?
About 160 vehicles per day (2020 count), of which roughly 2% are trucks.
How long is Nfa A409 (sa 4624) over Roan Creek?
The structure is 78 ft (23.9 m) long with a longest span of 48 ft (14.7 m) and a deck 20 ft wide.
Who owns Nfa A409 (sa 4624) over Roan Creek?
It is owned by the County Highway Agency.